20
12 11 16 13 17 20 18 15 14 19 
11 18 15 16 14 20 17 19 12 13 
19 13 17 20 12 18 16 15 14 11 
15 18 14 20 11 13 16 19 17 12 
20 19 17 14 11 15 12 13 16 18 
19 12 14 20 13 15 11 17 18 16 
11 14 12 18 16 15 13 20 19 17 
19 14 17 15 12 13 16 20 11 18 
12 14 19 13 15 17 20 18 11 16 
11 14 17 18 12 15 19 13 20 16 
1 10 3 2 7 4 9 6 8 5 
5 6 4 2 8 3 9 10 7 1 
10 4 8 6 2 9 1 3 5 7 
2 8 7 9 6 3 4 5 1 10 
8 4 10 9 5 7 2 3 1 6 
4 7 8 10 2 1 5 3 9 6 
5 2 10 4 9 8 1 6 3 7 
10 1 2 5 7 3 8 9 6 4 
9 8 6 7 10 5 3 1 4 2 
7 10 3 1 6 4 9 8 2 5 
forbidden 1 14
forbidden 1 15
forbidden 1 16
forbidden 1 17
forbidden 1 18
forbidden 1 20
forbidden 2 11
forbidden 2 12
forbidden 2 13
forbidden 2 15
forbidden 2 16
forbidden 2 17
forbidden 2 18
forbidden 2 19
forbidden 2 20
forbidden 3 12
forbidden 3 14
forbidden 3 15
forbidden 3 16
forbidden 3 17
forbidden 3 19
forbidden 3 20
forbidden 4 11
forbidden 4 12
forbidden 4 13
forbidden 4 14
forbidden 4 15
forbidden 4 16
forbidden 4 17
forbidden 4 18
forbidden 4 20
forbidden 5 11
forbidden 5 16
forbidden 5 18
forbidden 5 20
forbidden 6 13
forbidden 6 14
forbidden 6 16
forbidden 6 17
forbidden 6 18
forbidden 6 19
forbidden 6 20
forbidden 7 12
forbidden 7 13
forbidden 7 16
forbidden 7 19
forbidden 7 20
forbidden 8 12
forbidden 8 13
forbidden 8 14
forbidden 8 15
forbidden 8 16
forbidden 8 18
forbidden 8 19
forbidden 9 11
forbidden 9 12
forbidden 9 15
forbidden 9 16
forbidden 9 17
forbidden 9 20
forbidden 10 13
forbidden 10 14
forbidden 10 15
forbidden 10 16
forbidden 10 17
forbidden 10 18
forbidden 10 20